Heat-reflecting window pane
Abstract
Abstract A heat-reflecting window pane which has a transmissivity of 20 to 60 percent for visible light comprises a transparent support layer provided with a heat-reflecting gold film and when installed presents the support layer to the exterior. An absorption layer is disposed between the transparent support layer and the gold film, such absorption layer being of a material and thickness such that the light transmissivity of the combined support and absorption layers is 10 to 65 percent less than that of the support layer alone. The support layer has a refractive index and absorption coefficient of the same order of magnitude and may comprise an element from the fourth period of the periodic table with an atomic weight between 20 and 28 or an alloy containing such an element. An anti-reflective layer is disposed on the other side of the gold film and may be covered by a transparent protective layer. The anti-reflective layer, e.g., made of zinc sulphide, is made of dielectric material which is substantially absorption-free for visible light and has a refractive index of more than 1.7.
Inventors
- 👤 R Groth
Bibliographic Details
Claims Analysis
Total Claims: 11References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |